Python subprocess output to stdout

问题

I am using the subprocess module to run binaries from python.

To capture the output produced by the binary, I am using:

proc = subprocess.Popen (command_args, shell=False, stdout=subprocess.PIPE)
out = proc.communicate()[0]
#print the output of the child process to stdout
print (out)

What this does is print the output of the process AFTER it has finished executing. Is there anyway I can print this output to stdout WHILE the program is executing? I really need to see what the output is because these programs can run for a long time.

Thanks for the help.

回答1:

Simply don't send the output to a pipe:

proc = subprocess.Popen (command_args, shell=False)
proc.communicate()

来源：https://stackoverflow.com/questions/6062340/python-subprocess-output-to-stdout